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Cosmic Expansion: Supernovas shed light on dark energy

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1:28pm, December 14, 2005

Eight years ago, astronomers made an astonishing discovery: The rate at which the universe is expanding, assumed to have been steadily slowing since the Big Bang, is in fact speeding up. The entity revving up cosmic expansion remains elusive (SN: 5/22/04, p. 330: Dark Doings), but scientists have dubbed it dark energy. This week, a team reported gains in its efforts to understand and describe it.

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